通过向LOX-1减少动脉硬化斑块的形成
Jie Zhang1, Liwen Yu1, Wei Yang1
1State Key Laboratory for Innovation and Transformation of Luobing Theory, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China (J.Z., L.Y., W.Y., L.C., X. Wang, C.K., Z.L., R.R., W.Q., L.L., W.X., W.S., X. Wu, N.L., B.L., S.W., P.B., Y.Z., C.Z., M.Z.).
通过降解巨细胞中的甲酸样氧化低密度脂蛋白受体-1 (LOX-1) 来防止动脉样硬化. 这减少了泡细胞的形成和炎症,这表明TRIM31是治疗点.
科学领域:
- 免疫学
- 分子生物学
- 心血管研究
背景情况:
- 动脉样硬化是一种慢性炎症性疾病,涉及血脂积累和免疫细胞透动脉.
- 巨细胞通过内化氧化LDL,形成泡细胞和促进炎症发挥关键作用.
- 在动脉样硬化的免疫和炎症反应的调节中,ubiquitin-proteasome系统至关重要.
研究的目的:
- 研究含有三方基因31 (TRIM31) 的保护作用,这是一种E3泛酸酶,在巨细胞脂质代谢和炎症中起作用.
- 阐明TRIM31调节莱克类氧化低密度脂蛋白受体-1 (LOX-1) 的机制.
主要方法:
- 使用转录基因分析,宏特异性Trim31淘汰和过度表达的小鼠模型,以及Lox-1淘汰模型.
- 通过单细胞RNA测序和蛋白质/免疫沉质谱测量确定了TRIM31基质.
- 在小鼠和人类巨细胞中进行功能测定,包括无处不在机制澄清和救援实验.
主要成果:
- 在氧化LDL刺激的巨细胞和动脉样硬化斑块中,TRIM31的调节升高.
- 缺乏TRIM31会加重斑块,泡细胞形成和炎症,其中LOX-1被确定为关键基质.
- 在氨酸12中,TRIM31促进了LOX-1的与K48结合的泛化,导致其降解并产生动脉保护作用.
结论:
- TRIM31是一种可诱导,富含巨细胞的抗动脉样硬化因子.
- 通过向LOX-1进行蛋白质体降解,TRIM31抑制泡细胞的形成和炎症.
- TRIM31-LOX-1轴为巨驱动的动脉生成提供了潜在的治疗点.
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